Drs. Houts & Wirth’s poster (#PRM152) will be on display from 8:00AM-1:30PM on May 24th in the Auditorium & Hall C of the Hynes Convention Center at ISPOR’s 22nd Annual International Meeting, Boston, MA
Drs. McGinley & Wirth’s poster (#PRM103) will be on display from 8:00AM-1:30PM on May 24th in the Auditorium & Hall C of the Hynes Convention Center at ISPOR’s 22nd Annual International Meeting, Boston, MA
Drs. McGinley and Wirth’s poster (#PF11) will be on display in the Marina Ballroom on Friday, June 9th from 1:15-2:30PM at AHS 2017 in Boston, MA.
Drs. McGinley and Wirth’s Platform Presentation (#IOR10) will be held on Saturday, June 10th at 9:30AM in the at AHS 2017 in Boston, MA.
Drs. McGinley and Wirth’s poster (#PS66) will be on display in the Marina Ballroom on Saturday, June 10th from 12:30-2:00PM at AHS 2017 in Boston, MA
In the “wild,” IRT scores are typically on the standard normal metric, meaning that bell-shaped distribution when it has a mean of 0 and a standard deviation of 1. Due to SCIENCE!, we know that almost all of the scores in such a distribution will fall between -3 (well below average) and +3 (well above average) with a lot of the scores piling up closer to 0. For statistics-minded folks, this distribution is pretty familiar and easy to interpret (You … Read More
Computerized adaptive testing (CAT1) refers to the procedures underlying a test/assessment/whatevs that is generated “on the fly” by a computer, using a person’s previous answers to determine what question the person will see next. My amazing, trade-mark infringing, artwork notwithstanding, CAT is not magic – it is, in fact, SCIENCE! A reader-friendly conceptual overview of CAT was recently published here: https://www.ispor.org/ValueOutcomesSpotlight (paywall warning!). I’ll wait while you go read that… Finished? Great! OK – so now we know that … Read More
VPG’s Drs. McGinley and Wirth will be offering a workshop on the Introduction to Latent Curve Modeling at the International Society for Quality of Life Research (ISOQOL) 24th Annual Conference in Philadelphia, PA.
VPG’s Drs. Edwards, Houts, & Cai’s paper entitled “A diagnostic procedure to detect departures from local independence in item response theory models” has been accepted for publication in Psychological Methods.
Shulman, K., McGinley, J. S., Wirth, R. J., Buse, D. C., and Lipton, R. L. (2017). Comparing Average Level and Within-person Consistency in Clinical Disability Using AVP-825 vs. Sumatriptan Tablets: Applying Location Scale Mixed-effects Models. Poster to be presented at the 2017 American Academy of Neurology (AAN). Boston, MA.